Telescoping pen or pencil



1950 L. e. DUFILHO 2,518,128

' TELESCOPING PEN 0R PENCIL Filed 001;. 14, 1947 lNVENTOR. Leon G.Dufilho X4Azz V ATTORNEYS gs PATENT OFFICE p; 'ITELns cQinfGrEN R PENCILI Leon Dufilho, ShrevepgflyLa,

Application October 14, 1947, Serial No. 779,747

This invention is a telescoping pen or pencil, preferably of the typehaving linear graduations. Such a pen or pencil can be readily carriedin the pocket in telescoped position, and readily extended into positionfor measuring or writing or both.

Telescoping pencils provided with linear graduations are broadly old.The principal object of the present invention is to provide a simplifiedand improved construction for this type of pencil, susceptible ofquantity production at low cost.

Another object of the invention is to provide animproved joint for thetelescoping sections, whereby the sections are held in alignment so thatthey will slide smoothly in and out of each other.

Another object of the invention is to provide a telescoping pen orpencil having telescoping sections wherein each section has at least onefiat side and is provided with in-struck or out-struck abutments. Theseabutments, by virtue of the fiat sided construction, are held inalignment with each other, so that they come into engagement when thepencil is extended and serve as abutments for limiting the outwardmovement of the telescoping section. These abutments are accuratelypositioned, so that when they are in engagement, the linear graduationson the sections are accurately positioned with respect to each other.

The invention will be further described in connection with theaccompanying drawing, illustrating the preferred construction.

In this drawing, Fig. 1 is a perspective view of the improvedtelescoping pen or pencil and Fig. 2 is an enlarged sectional view takenon the line 2-2 ofFig. 1.

Referring now to these drawings, the pen or \pencil comprises aplurality of tubular telescoping sections 2, 4 and 6 for example, eachsuccessively larger, so that they telescope together,

The end of one end section is provided with a writing tip 8 and the endof another end section is provided with the usual eraser l0.

The telescoping sections are each provided with at least one flattenedside, so that they slide in and out, but cannot be rotated with respectto each other. In the construction illustrated, four flat sides areshown, but evidently tubular units having less than four or more thanfour sides could be used, utilizing triangular, pentagonal or hexagonaltubular units, for example.

Coming now to an important feature of the invention, one of thetelescoping sections, such as 4, is provided with one or more out-strucklugs 1 Claim. (Cl. 33-161) or abutments l2, while the companiontelescoping section 6 is provided with one or more outstruck lugs orabutments I4. The abutments l2 and I4 are accurately positioned withrespect to the linear-graduations l6 on the several sections of thepencil, so that when the pencil is extended, these lugs come intoengagement and provide limiting stops for accurately positioning thetelescoping sections with respect to each other, whereby the lineargraduations on the several sections are accurately positioned withrespect to each other.

The outermost surface of lugs I2, and the innermost surface of lugs I4also are in slidable, frictional engagement with the surface of thecompanion telescoping section, thereby providing guide surfaces formaintaining a snug fit between the sections, for keeping them inalignment and thereby providing a continuous slidable contact forpreventing them from wobbling with respect to each other.

In order further to maintain a snug, slidable,

frictional fit between the sections, a marginal portion or lip, such asl3, on section 6 for example, is bent inwardly to provide a slidablebearing surface which engages frictionally on the outer surface of itscompanion telescoping section 4, which also aids in maintaining thesections in snug and secure sliding engagement.

Therehas thus been provided a telescoping pen or pencil, provided withlinear graduations, which can be manufactured in quantity and which byvirtue of the lugs and abutments are maintained in snug, slidable,frictional engagement and which, particularly by virtue of theengagement-of the positioning lugs against each other, accuratelyposition the linear graduations with respect to each other when inextended position.

While the invention has been described in some detail, it should beunderstood that the dis-' closure is illustrative rather thanrestrictive of the invention, and that it may be carried out in otherways.

I claim as my invention:

A telescoping writing instrument comprising a plurality of nonrotatingtelescoping tubular sections of a progressively varying size providedwith linear graduations, one end of each section being adapted to beinserted in one end of each larger section, the section receiving end ofeach section being provided with an instruck lip extending toward thesection to be received, each section being provided at the sectionreceiving end on the side adjacent the instruck lip with an instruck lugspaced inwardly from and extending oppositely from said instruck lip,each section being provided near its inserted end and on the same sideas said instruck lip and said instruck lug with an outstruck lugextending toward the opposite end of the section and being adapted toabut the instruck lug of the next section, whereby the sections areprevented from pulling apart, each of said instruck and outstruckelements being provided with a surface parallel to the surface ofthetubular sections, whereby three hearing surfaces are provided forslidably telescoping said sections along a straight line independent ofthe extent of telescoping.

LEON G. -DUF'ILHO;

REFERENCES CITED UNITED STATES PATENTS Number Name Date 300,346 CollardJune 17, 1884 575,671 Watts Jan. 19, 1897 648,576 Taylor May 1, 1900960,151 Blumenthal H May 31, 1910 1,050,733 Greathead Jan. 14, 1913FOREIGN PATENTS Number Country Date 13,617 Great Britain June 18, 1903'A. D.'.1903

